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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="root"></div>
    <script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script>
    <script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
    <script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
    <script type="text/babel">

        function reactFun() {
            console.log('react 点击事件');
        }
        const html = (
            <div>

                <button onClick={() => {
                    console.log('react 点击事件');
                }}>点击我</button>

                <button onClick={reactFun}>点击我</button>

            </div>)
        ReactDOM.render(html, document.getElementById('root'))
    </script>
</body>

</html>